Struct pica_record::matcher::subfield::InMatcher

pub struct InMatcher { /* private fields */ }

A matcher that checks if a subfield value is in a predefined list.

Implementations

impl InMatcher

pub fn new(matcher: &str) -> Result<Self, ParseMatcherError>

Creates a new InMatcher.

Errors

This function fails if the given expression is not a valid in-matcher.

Example

use pica_record::matcher::subfield::InMatcher;

let _matcher = InMatcher::new("0 in ['Tp1', 'Tpz']")?;

pub fn is_match<'a>( &self, subfields: impl IntoIterator<Item = &'a SubfieldRef<'a>>, options: &MatcherOptions, ) -> bool

Returns true if at least one subfield is found, where the value is contained in the matcher list.

Example

use pica_record::matcher::subfield::InMatcher;
use pica_record::matcher::MatcherOptions;
use pica_record::primitives::SubfieldRef;

let options = MatcherOptions::default();
let subfield = SubfieldRef::new('0', "Tp1")?;

let matcher = InMatcher::new("0 in ['Tp1', 'Tpz']")?;
assert!(matcher.is_match(&subfield, &options));

let matcher = InMatcher::new("0 not in ['Ts1', 'Tsz']")?;
assert!(matcher.is_match(&subfield, &options));

Trait Implementations

impl Clone for InMatcher

fn clone(&self) -> InMatcher

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for InMatcher

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for InMatcher

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Format the in-matcher as a human-readable string.

Example

use pica_record::matcher::subfield::InMatcher;
use pica_record::matcher::MatcherOptions;

let matcher = InMatcher::new("ANY [ab] in ['foo', 'bar']")?;
assert_eq!(matcher.to_string(), "ANY [ab] in ['foo', 'bar']");

impl PartialEq for InMatcher

fn eq(&self, other: &InMatcher) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for InMatcher

impl StructuralPartialEq for InMatcher